注水井固体溶垢剂的研究及应用

Study and application of solid dissolving agent in water injection well

针对大庆油田第八采油厂扶余油层油井的结垢状况,优选出性能优良的氨基磺酸、固体盐酸以及络合剂EDTA作为溶垢剂配方,并确定其比例为4∶1∶1。对油田现场垢样进行溶垢实验,当溶垢温度为60℃时,溶垢效率可达到90%以上,并且前5h的溶垢速率较快,溶垢率可达到50%以上。现场试验表明,固化加工成型的溶垢酸棒溶垢效果好,有效的解决了注水管柱严重结垢的现象。

Aiming at the scaling condition of Fuyu oil well in the eighth oil recovery, plant of Daqing Oilfields, we selected the excellent amino sulfonic acid, solid hydrochloric acid and complexing agent EDTA as the scale inhibitor formula, and determined that the ratio was 4：1：1. The scale experiment is carried out in the field. When the scale temperature is 60 degrees, the scale removal efficiency can reach more than 90%, and the scale of the former 5h is faster, and the scale removal rate can reach over 50%. The field test shows that the scaling effect of the scale acid bar formed by the curing process is good, and it effectively solves the serious scaling phenomenon of the water injection pipe column.